Study On Systematic Taxonomy And Micromorphology Of The Tillandsia Plants Introduced Into China

Tillandsia (Bromeliaceae) plants, native to South and Central America and distributed in tropical and subtropical district, are classified as perennial, aerophyte or epiphyte herbs and enjoy high ornamental value.Study the systematic taxonomy and micro-morphology to 31 kinds of Tillandsia plants that introduced into china.The results as follows:1. The external morphology of 31 kinds of Tillandsia plants were studied and described, which favored in working out the key of species.2. Study the micro-morphology characters of the leaves, which were inconsistent with traditional taxonomy results, but could be used to distinguish species.3. Leaves of 19 species of Tillandsia were anatomized and their structure was researched. All these anatomical structure characters were inconsistent with traditional taxonomy results.4. For micro-morphology of the pollen, The micro-morphology of pollen was an important basis for systematic taxonomy on Tillandsia plants, because it was very different within species.5. After Sequence Related Amplified Polymorphism on 34 species by applying ten primer combinations, their genetic similarity was between 0.6～0.8 and 0.8～0.9. SRAP mark technology could detect many genetic differences between these 34 species.6. Doing trnL-F sequence data for 33 Tillandsia plants, There was an insertion between 301-322bp for T.fasciculata and T.tenuifolia sequenced as TAACATTATGAATGATTATGA. Beside this, a special polyT sequence was discovered existing between 826-830bp, which favor in identifying Subgen. Anoplophytum, Subgen. Tillandsia and Subgen.Allardtia.7. According to this thesis,T.juncea was supportive to be classified as Subgen.Anoplophytu.The adjusted systematic relationship as follows:Subgen.Diaphoranthema-Subgen.Allardtia-Subgen Anoplophytum-Subgen.Phytarrhiza-Subgen.Pseudo-Catopsis-Subgen.Tillandsia.